Cheapest return flights from Ontario to Las Vegas in December from 66€

AirHint found the following cheapest return flights from Ontario (ONT) to Las Vegas (LAS) in December 2025 (see full year).

Return flights

04 Dec - 08 Dec Southwest Airlines direct
06 Dec - 08 Dec Southwest Airlines direct
03 Dec - 06 Dec Southwest Airlines direct
10 Dec - 10 Dec Southwest Airlines direct
05 Dec - 06 Dec Southwest Airlines direct
06 Dec - 07 Dec Southwest Airlines direct
07 Dec - 13 Dec Southwest Airlines direct
01 Dec - 03 Dec Southwest Airlines direct
20 Dec - 27 Dec Frontier Airlines direct
21 Dec - 23 Dec Frontier Airlines direct
30 Dec - 06 Jan Southwest Airlines
30 Dec - 02 Jan Frontier Airlines direct

Also check the deals for one-way flights from Ontario to Las Vegas in December.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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